The chicken liver sponge has sailed through a test of its ability to filter pollutants in a harbour in Spain’s Costa Brava In the polluted waters of Marina Palamós on Spain’s Costa Brava, Manuel Maldonado, a sponge biologist, noticed something unusual last month: red starfish had started settling...
Source: [Guardian International](https://www.theguardian.com/environment/2026/sep/01/sea-chicken-liver-sponge-filter-pollutants-harbour-spain-costa-brava)